Long-term tagging of elvers, Anguilla anguilla, with radioactive europium

Elvers were labeled with 152Eu and 155Eu. Optimum conditions turned out to be incubation for 3 h at 15.degree. C in artificial sea water containing 2% NaCl and 0.1% KCl, EuCl3 at 1 mCi (37 MBq) l-1 and an eel concentration of about 15%. Laboratory experiments pointed to a biological half-life of add...

Full description

Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Hansen, Heinz Johs. Max, Fattah, A. T. A.
Format: Article in Journal/Newspaper
Language:English
Published: 1986
Subjects:
Online Access:https://orbit.dtu.dk/en/publications/f474f092-3ab5-4505-8426-e2caf66263cb
https://doi.org/10.1111/j.1095-8649.1986.tb04970.x
Description
Summary:Elvers were labeled with 152Eu and 155Eu. Optimum conditions turned out to be incubation for 3 h at 15.degree. C in artificial sea water containing 2% NaCl and 0.1% KCl, EuCl3 at 1 mCi (37 MBq) l-1 and an eel concentration of about 15%. Laboratory experiments pointed to a biological half-life of added europium of 1.6 .+-. 0.5 years. Thirteen hundred 155Eu-labelled elvers (50 Bq per eel), each weighing on average 0.21 g, were set out near Oskarshamn on the east coast of Sweden in June 1982. Three of these were caught nearby in May 1985 and one was caught in August 1985. They weighed then on average 56 g and showed no significant loss of label other than the physical half-life (5.1 years). All the radioactivity was found in bone tissue.